Limits and SizesWe opened each page below on 14 November 2026 and copied the figure it states. If you open the page later and the number is different, the app has changed it: please tell us. We list only what the pages say; where a page gives no figure (for example a caption limit for Instagram, or a description limit for WhatsApp groups), we give none.
| What | Figure | Page | Read on |
|---|---|---|---|
| YouTube title | 100 characters | support.google.com/youtube/answer/57404 | 14 November 2026 |
| YouTube description | 5,000 characters | support.google.com/youtube/answer/57404 | 14 November 2026 |
| YouTube resolutions (16:9) | 240p to 8K list | support.google.com/youtube/answer/6375112 | 14 November 2026 |
| YouTube Shorts thumbnail | 9:16 recommended | support.google.com/youtube/answer/72431 | 14 November 2026 |
| Instagram bio | 150 characters | help.instagram.com/728994388226960/ | 14 November 2026 |
| Instagram hashtags | up to 5 per post | help.instagram.com/351460621611097 | 14 November 2026 |
| Instagram photo | width up to 1080; ratio 1.91:1 to 3:4 | help.instagram.com/1631821640426723/ | 14 November 2026 |
| Instagram reel | ratio 1.91:1 to 9:16; 30 FPS; 720 px; cover 420 x 654 | help.instagram.com/1038071743007909 | 14 November 2026 |
| X post | 280 (and 4,000 for longer posts on the same page) | help.x.com/en/using-x/how-to-post | 14 November 2026 |
| WhatsApp group name | 100 characters | faq.whatsapp.com/493270532852273/ | 14 November 2026 |
Not covered because we could not read an official figure: Facebook, LinkedIn, Snapchat, Telegram and Pinterest.